I had only gotten around to build nsd 3.2.11 a few days ago and run it through testing when I was told about the 3.2.12 security release. So there was only a small (but important) code change to address the vulnerability issue. It ran on my own name server for nohats.ca for 24h without issues, so I could quickly pull the pending 3.2.11 updates and build and release updates today for 3.2.12 when CVE-2012-2978 became public.